/* CoralCube | Massively Multiplayer Online Role-Playing Game(MMORPG) Emulator.
|* 
|* Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
|*               2008-2010 TrinityCore <http://www.trinitycore.org/>
|*               2008-2010 CoralCube <http://www.CoralCube.com/>
|*
|* This program is free software. You can redistribute it and/or modify it under the terms of 
|* the GNU General Public License as published by the Free Software Foundation, either 
|* version 2 of the License.
|*
|* This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY, 
|* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
|* See the GNU General Public License for more details.
|*
|* You should have received a copy of the GNU General Public License along with this program. 
|* If not, see <http://www.gnu.org/licenses/>.
|*/

#ifndef __EVENTPROCESSOR_H
#define __EVENTPROCESSOR_H

#include "Define.h"

#include <map>

// Note. All times are in milliseconds here.

class BasicEvent
{
public:
    BasicEvent() { to_Abort = false; }
    virtual ~BasicEvent()                               // override destructor to perform some actions on event removal
    {
    };

    // this method executes when the event is triggered
    // return false if event does not want to be deleted
    // e_time is execution time, p_time is update interval
    virtual bool Execute(uint64 /*e_time*/, uint32 /*p_time*/) { return true; }

    virtual bool IsDeletable() const { return true; }   // this event can be safely deleted

    virtual void Abort(uint64 /*e_time*/) { }            // this method executes when the event is aborted

    bool to_Abort;                                      // set by externals when the event is aborted, aborted events don't execute
    // and get Abort call when deleted

    // these can be used for time offset control
    uint64 m_addTime;                                   // time when the event was added to queue, filled by event handler
    uint64 m_execTime;                                  // planned time of next execution, filled by event handler
};

typedef std::multimap<uint64, BasicEvent*> EventList;

class EventProcessor
{
public:
    EventProcessor();
    ~EventProcessor();

    void Update(uint32 p_time);
    void KillAllEvents(bool force);
    void AddEvent(BasicEvent* Event, uint64 e_time, bool set_addtime = true);
    uint64 CalculateTime(uint64 t_offset) const;
protected:
    uint64 m_time;
    EventList m_events;
    bool m_aborting;
};
#endif
